According to the sources provided, Lipitor (atorvastatin) can be taken with or without food. However, there are some recommendations and considerations to keep in mind.

The first source, Drug Patent Watch, does not specifically mention whether Lipitor should be taken with or without food. It provides information about the drug itself, such as its patent status and manufacturer, but does not offer guidance on how to take it.

The second source, NHS (National Health Service) in the UK, states that atorvastatin can be taken with or without food. However, it advises taking it consistently, either always with food or always without food, to ensure a consistent effect. This recommendation aims to avoid any potential variability in the drug's absorption and effectiveness.

The third source, Drugs.com, also indicates that atorvastatin can be taken with or without food. It explains that taking it with food may help improve its absorption and reduce the risk of stomach upset. However, it also states that taking it without food does not affect its effectiveness.

In summary, based on the provided sources, it appears that Lipitor (atorvastatin) can be taken with or without food. However, for consistent results, it is advisable to take it consistently with or without food, rather than alternating between the two. If you have any specific concerns or questions about taking Lipitor, it is always best to consult with your healthcare provider for personalized advice.

Sources:
[1] Drug Patent Watch. "Lipitor." Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] NHS. "Atorvastatin: How and when to take." Retrieved from https://www.nhs.uk/medicines/atorvastatin/how-and-when-to-take-atorvastatin/
[3] Drugs.com. "Should I eat food before taking atorvastatin?" Retrieved from https://www.drugs.com/medical-answers/eat-food-taking-atorvastatin-3565628/